Combined engine and dynamo.



No. 632,896. Patented Sept. I2, I899.

C. C. COWAN. COMBINED ENGINE AND DYNAMO.

Wit/2666 es 7 No. 632.895 Patented Sept. [2, I899. C. C. COWAN.

COMBINED ENGINE AND DYNAMO.

\Application filed Jan. 6, 1899.]

3 Sheets-Sheet 2 (No Model.)

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No. 632,896. Patented Sept. I2, [899. C. C. COWAN.

COMBINED ENGINE AND DYNAMO.

(A lication filed (ran. a, 1899.

(No Model.) 3 Sheets-Sheet 3.

UNITED STATES PATENT Orrice.

CHARLES (E. ()(HVAN, Oh MEMPHIS, TENNESSEE, ASSIGNOR TO THE IVIIIT- FIELD COMPANY, OF SAME PLACE.

COMBINED ENGINE AND DYNAMO.

SPECIFICATION formingpart of Letters Patent No. 632,896, dated September 12, 1899.

Original application filed September 14, 1898, Serial No. 690,900. Divided and this application filed January 6, 1899. Serial No. 701,345. (No model.)

To all whom may concern:

Be it known that I, CHARLES C. COWAN, a citizen of the United States, residing at Memphis, in the county of Shelby and State of Tennessee, have invented a certain new and useful Improvement in a Combined Engine and Dynamo,of which the following is a specification.

This is a division of an application for Letters Patent filed September 14,1898,and nu mbered serially 690,900.

My invention relates to an improved combined engine and dynamo; and the object of the invention is to simplify the construction and improve the operation of such devices.

In carrying out my invention I first construct a dynamo of any suitable variety or type and mount directly thereon, either 011 one or more of the pole-pieces thereof or on a yoke or yokes connecting the pole-pieces, an engine-cylinder containing an ordinary reciprocating piston, together with the proper valve mechanism, which piston is suitably guided in its reciprocations by means of a guide or guides formed directly either in said pole-piece or in said yoke and being connected with the rotating armature of the dynamo, preferably by a reciprocating driving-rod operated from a wrist'pin working in a slot formed in the pole-piece or yoke,and the valve of the cylinder being operated, preferably, from the armature-shaft by an ordinary eecentric connection. Such a device will be very compact in its construction, will occupy no greater floor-space than is needed for a dynamo alone, and will be relatively short in its longitudinal dimensions.

In order that my invention may be better understood, attention is directed to the accompanying drawings, forming part of this specification, and in which Figure 1 is a sectional view of a combined engine and dynamo embodying-my present improvements, the dynamo illustrated in this figure being of the well-known bipolar type and the engine-cylinder being carried on one of the pole-pieces thereof Fig. 2, a side view of the same; Fig. 3, a plan view, and Fig. 4 a section on the line 4 4; of Fig. 2.

In all of the above views corresponding 19 is connected.

parts are represented by the same letters of reference.

A represents a dynamo, and B a steam or other pressure engine. The dynamo illustrated is provided with two oppositelyplaced pole-pieces C and D, having coils E E thereon. An armature F rotates between the two pole-pieces and is mounted on a shaft G. The pole-pieces are connected together by two yokes H H. The armature-shaft- G is supported in any suitable wayas, for example, by means of standards I, secured to one of the pole-pieces. The engine B comprises an ordinary engine-cylinder .I,having an extension K at its lower end, provided with a flange a, secured to the pole-piece G by means of machine-bolts a. In order to magnetically separate the engine from the dynamo, whereby the mass of iron or steel of which the engine is constructed may not affect the magnetism of the pole-piece O, I prefer to interpose between the fiange a and the pole-piece a layer of non-magnetic material I), which is composed, preferably, of zinc. Mounted to reciprocate in the cylinder is a piston 0, connected directly with the piston-rod d, the outer end of which is connected to a slide-head e, which works in a cylindrical guide chamber 6, formed in the element of the dynamo to which the cylinder is connected. This guide-chamberconstitutes the guide for the slide-head e. A wrist-pin gextends outward from the slide head 6 and works in a slot g, extending parallel with the guide-chamber and formed in the pole-piece. This wrist-pin is connected by a connecting-rod 7a to a wrist-pin Z on a disk m,

keyed to one end of the armature-shaft.

The cylinder J is provided with a valvechest h of any suitable type. Mounted in the valvechest h is a valve 71, which controls the admission of steam to the cylinder. Preferably this valve is of the rotary type and is mounted on a valve-stem 0, to which an operating-lever The lever 13 is partially rotated in an arc of the desired extent by a connecting-rod (1, having an eccentric-strap r at its rear end. The eccentriestraprworks on an eccentric keyed to the end of the armatureshaft opposite to the disk M. It will be observed that by admitting steam. to the cylinder through the main steam-pipe 3, controlled by a throttle-valve i, the piston a will reciprocate in the cylinder J, driving the dynamo-armature through the connecting-rod 7;, the wrist-pin g reciprocating in the slot g. In thus reciprocating the armature-shaft will operate the eccentric to control the proper admission of steam to the cylinder by means of the valve n.

It will of course be understood that the connections between the engine and armature may differ materially from those which I have described without departing from the spirit of my invention, which, obviously, is independent of the specific details of construction; that any type or Variety of dynamo may be used; that instead of mounting the enginecylinder on the pole-piece,as explained, it may be secured to the yoke or to any other stationary element of the dynamo, and that a plurality of cylinders may be used, connected with the armature in any suitable way and mounted on any desired stationary element of the dynamo.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is as follows:

1. In a combined engine and dynamo, the combination of a dynamo, a separate engine bolted to a stationary element of the dynamo so as to be entirely removable therefrom, and a guide for the engine formed in said stationary element, substantially as set forth.

2. In a combined engine and dynamo, the combination of a dynamo, a separate engine bolted to the pole-piece of said dynamo so as to be entirely removable therefrom, and an engine guide orguides formed directlyin said pole-piece, substantially as set forth.

3. In a combined engine and dynamo, the combination of a dynamo, an engine-cylinder bolted to the pole-piece of said dynamo so as to be entirely removable therefrom, a guide chamber in said pole-piece, a slide working in said guidechamber, connections between said slideand the engine-piston, and connections between the slide and the dynamo-armature, substantially as set forth.

4c. In a combined engine and dynamo, the combination of a dynamo, an engine-cylinder bolted directly to the pole-piece of said dynamo so as to be entirely removable therefrom, a guide-chamber formed in said polepiece in line with the said engine-cylinder, a slide working in said guide-chamber, connections between said slide and the engine-piston, a wrist-pin carried by said slide and working in a slot in the pole-piece, and connections between said wrist-pin and the dynamoarmature, substantially as set forth.

5. In a combined engine and dynamo, the combination of a dynamo, an engine-cylinder bolted directly to the pole-piece of said dynamo so as to be entirely removable therefrom, a guide-chamber formed in said polepiece in line with said engine-cylinder, a slide working in said guidechamber, connections between said slide and the engine-piston, a wrist-pin carried by said slide and working in a slot in the pole-piece, and a connectingrod connecting said wrist-pin and the dynamo armature, substantially as set forth.

This specification signed and witnessed this 7th day of November, 1898.

CHARLES C. COWAN.

W it nesscs:

J. S. \VILLIAMS, B. ll. FINLEY. 

